The third blade gives us the option to configure a lot of additional settings. In the previous chapter, we focused only on the networking part, but this time we'll explore these options more closely.
The high availability section gives us two options—Availability zone and Availability set.
The Availability zone determines the zones inside the Azure Datacenter. These zones have an independent power source, networking, and cooling, and protect your VM against failures inside the Datacenter. If you have a critical service that will run on multiple VMs, you want to place these VMs in different availability zones so, if there is a failure on the Datacenter level, there is less chance that all your VMs will be impacted.
Availability ...